Commit cba22d86 authored Oct 21, 2019 by Jan Kara Committed by Jens Axboe Nov 03, 2019

bdev: Refresh bdev size for disks without partitioning



Currently, block device size in not updated on second and further open
for block devices where partition scan is disabled. This is particularly
annoying for example for DVD drives as that means block device size does
not get updated once the media is inserted into a drive if the device is
already open when inserting the media. This is actually always the case
for example when pktcdvd is in use.

Fix the problem by revalidating block device size on every open even for
devices with partition scan disabled.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 731dc486

fs/block_dev.c

+10 −9

Original line number	Diff line number	Diff line
		@@ -1403,10 +1403,6 @@ static void flush_disk(struct block_device *bdev, bool kill_dirty)
		"resized disk %s\n",
		bdev->bd_disk ? bdev->bd_disk->disk_name : "");
		}

		if (!bdev->bd_disk)
		return;
		if (disk_part_scan_enabled(bdev->bd_disk))
		bdev->bd_invalidated = 1;
		}

		@@ -1514,10 +1510,15 @@ static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part);

		static void bdev_disk_changed(struct block_device *bdev, bool invalidate)
		{
		if (disk_part_scan_enabled(bdev->bd_disk)) {
		if (invalidate)
		invalidate_partitions(bdev->bd_disk, bdev);
		else
		rescan_partitions(bdev->bd_disk, bdev);
		} else {
		check_disk_size_change(bdev->bd_disk, bdev, !invalidate);
		bdev->bd_invalidated = 0;
		}
		}

		/*

Admin message